1761

NTE1761 (Active High) & NTE1762 (Active Low)
Integrated Circuit
Infrared Remote Control Preamp
Features:
D High Frequency Amplifier with a Control Range of 66dB
D Synchronous Demodulator and Reference Amplifier
D AGC Detector
D Pulse Shaper
D Q−Factor Killing of the Input Selectivity, which is Controlled by the AGC Circuit
D Input Voltage Limiter
Absolute Maximum Ratings:
Supply Voltage (Pin8), VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.2V
Output Current Pulse Shaper (Pin11), I11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10mA
Voltages Between Pins (Note 2)
Pin2 and Pin15, V2−15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.5V
Pin4 and Pin13, V4−13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.5V
Pin5 and Pin6, V5−6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.5V
Pin7 and pin10, V7−10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.5V
Pin9 and Pin11, V9−11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.5V
Operating Ambient Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −25° to +125°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65° to +150°C
Note 1. NTE1761 is a discontinued device and no longer available.
Note 2. All pins except Pin11 are short−circuit protected.
DC Electrical Characteristics: (TA = +25°C, VCC = V8 = 5V unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Supply (Pin8)
Supply Voltage
VCC
4.65
5.0
5.35
V
Supoply Current
ICC = I8
1.2
2.1
3.0
mA
V2−15(P−P) f = 36kHz, Note 3
−
15
25
µV
f = 36kHz, Note 4
−
−
5
µV
60
66
−
dB
0.02
−
200
mV
Controlled High Frequency Amplifier (Pin2 and Pin15)
Minimum Input Signal (Peak−to−Peak)
AGC Control Ragne (Without Q−Killing)
Input Signal for Correct Operation (Peak−to−Peak)
V2−15(P−P) Note 4
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Q−Killing Inactive (Peak−to−Peak)
V2−15(P−P) I3 = I14 < 0.5µA
−
−
140
µV
Q−Killing Active (Peak−to−Peak)
V2−15(P−P) I14 = I3 = Max
28
−
−
mV
Note 3. For NTE1761, voltage at Pin9 is HIGH (−I9 = 75µA).
For NTE1762, voltage at Pin9 is LOW (I9 = 75µA).
Note 4. For NTE1761, voltage at Pin9 remains LOW. For NTE1762, voltage at Pin9 remains HIGH.
DC Electrical Characteristics (Cont’d): (TA = +25°C, VCC = V8 = 5V unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Inputs
Pin2 Voltage
V2
2.25
2.45
2.65
V
Pin15 Voltage
V15
2.25
2.45
2.65
V
Pin2 Resistance
R2−15
10
15
20
kΩ
Pin2 Capacitance
C2−15
−
3
−
pF
Input Limiting, Pin1
V1−16
I1 = 3mA
−
0.8
0.9
V
Output Voltage HIGH (Pin9)
−V9−8
−I9 = 75µA
−
0.1
0.5
V
Output Voltage LOW (Pin9)
V9
I9 = 75µA
−
0.1
0.5
V
Output Current, Output Voltage HIGH
−I9
V9 = 4.5V
75
120
−
µA
V9 = 3.0V
75
130
−
µA
V9 = 1.0V
75
140
−
µA
V9 = 0.5V
75
120
−
µA
3.1
4.7
6.2
kΩ
Outputs
Output Current, Output Voltage LOW
Output Resistance Between Pin7 and Pin10
I9
R7−10
Pulse Shaper (Pin11)
Trigger Level in Positive Direction
V11
Voltage Pin9 changes
from HIGH to LOW
3.75
3.9
4.05
V
Trigger Level in Negative Direction
V11
Voltage Pin9 changes
from LOW to HIGH
3.4
3.55
3.7
V
Hysteresis of Trigger Levels
∆V11
0.25
0.35
0.45
V
AGC Capacitor Charge Current
−I12
3.3
4.7
6.1
µA
AGC Capacitor Discharge Current
I12
67
100
133
µA
AGC Detector (Pin12)
Q−Factor Killer (Pin3 and Pin14)
Output Current (Pin3)
−I3
V12−16 = 2V
2.5
7.5
15
µA
Output Current (Pin14)
−I14
V12−16 = 2V
2.5
7.5
15
µA
Note 4. Undistorted output pulse with 100% AM input.
Pin Connection Diagram
Input Signal 1
Input Signal 2
Q Factor Input 3
16 GND
15 Input Signal
14 Q Factor Input
Feedback Cap Input 4
13 Feedback Cap Input
Feedback Cap Input 5
12 AGC Detector Time Constant
Feedback Cap Input 6
11 Pulse Shaper Capacitor
Coil Input 7
VCC 8
10 Coil Input
9 Output
16
9
.260
(6.6)
Max
1
8
.300 (7.62)
.785 (19.9) Max
.200
5.08)
Max
.245
(6.22)
Min
.100 (2.54)
.700 (17.7)